78 



George C. Whipple 



show the possibihty of computing the value of pure water in terms of 

 dollars and cents, and to illustrate the financial value of filtration and 

 justify its cost. 



TABLE 



Depreciation Due to SA^aTARY Quality. 



Values of D for Different Values of T-N in the formula D = 2.ts {T-N), 

 Values of D in Dollars for Million Gallons. 



TABLE 10. 



Esthetic Deficiency Due to Turbidity. 



Values of P^ for Different Values of t in the Formula ^, = 5V /. 

 Per Cent of Objecting Consumers. 



